defcheck_substring_with_index(main_string,substring):try:main_string.index(substring)returnTrueexceptValueError:returnFalse# 示例调用main_str="Python是一个强大的编程语言"sub_str="强大"print(check_substring_with_index(main_str,
"substring=string[0:5]print(substring) 1. 2. 3. 运行上述代码,输出结果为: Hello 1. 在这个例子中,string[0:5]表示从字符串string的第一个字符(索引为0)开始,截取到第五个字符(索引为4),得到的子串为Hello。 截取多个字符串前几位 如果要同时截取多个字符串的前几位,可以使用循环结构或列表推导式。下...
Python can’t find the all-lowercase string "secret" in the provided text. Humans have a different approach to language than computers do. This is why you’ll often want to disregard capitalization when you check whether a string contains a substring in Python. You can generalize your ...
When working with text data in Python, a team member was checking whether a string contains a particular substring. I suggested a few methods that Python provides to do this. Let me show you different methods tocheck if a Python string contains a substringusing some real-time examples. To c...
The python str class has a __contains__() method that will check if a python string contains a substring. It will return true if it’s found and will return false if it’s not. You will notice that the method name is wrapped in two underscores. This prevents this method from being ...
A substring is the part of a string. Python string provides various methods to create a substring, check if it contains a substring, index of substring etc. In this tutorial, we will look into various operations related to substrings. Let’s first look at two different ways to create a ...
The in Operator: A simple, readable way to check if a python string contains another string. str.find() Method: Searches for a substring and returns the index of the first occurrence, or -1 if not found. str.index() Method: Similar to str.find(), but raises a ValueError if the subs...
一部分substring ="Python"[1:4]print("截取字符串中的一部分示例:", substring)#输出:yth#🌾:使用 in 运算符check_in ="H"in"Hello"print("使用 in 运算符示例:", check_in)#输出:True#🌾:使用 not in 运算符check_not_in ="H"notin"Hello"print("使用 not in 运算符示例:", check_not_...
Python 判断字符串是否存在子字符串 Python3 实例 给定一个字符串,然后判断指定的子字符串是否存在于该字符串中。 实例 [mycode3 type='python'] def check(string, sub_str): if (string.find(sub_str) == -1): print('不存在!') else: ..
2. Usingfind()to check if a string contains another substring We can also usestring find() functionto check if string contains a substring or not. This function returns the first index position where substring is found, else returns -1. ...